And in orderdig deeper into the lives of these two young suspects, we sent kirit radia to the area where the family comes from. Here is what he found today. Repter: In a tearful phone call with abc news this evening, the mother of the suspected boston bombers, said she and her husband planned to travel to the u.S. To see their young son captured friday night. She insists her sons were set up, and that her older son was investigated because he loved islam. And didn't do anything bad. Her comments feed the mystery over what happened to turn the two brothers into terrorist. Dagestan is a poor and dangerous region in russia. Home to listen islamic militant uprising. But friends and family say the parents rejected islamic fundamentalism. He wasn't too religious. This neighbor it is about the father. There was no fanaticism. Reporter: But it was just a year ago on a trip here, that the older son setoff alarm bells amongst the family. Abc news has learned that his uncle kicked him out of the house, upset about his extremist views. The village where the mother's family lived, we searched for clues about the brothers. Few were willing to talk. But in her call with abc news, the mother said, I don't know how to live with this. Kirit radia, abc news, dagestan. The view from russia tonight.

This transcript has been automatically generated and may not be 100% accurate.